Weather is probably a major factor when you plan your trip to Kodaikanal, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and May, with an average temperature of 28°C, while the coldest months are January and December, with an average of 24°C. The rainiest months in Kodaikanal are October, November, August and December, with each month seeing an average of 179 mm of rainfall.